MCQ Questions Chapter 12 Organic Chemistry – Some Basic Principles and Techniques Class 11 Chemistry

Please refer to MCQ Questions Chapter 12 Organic Chemistry – Some Basic Principles and Techniques Class 11 Chemistry with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Chemistry issued for the current academic year. We have provided MCQ Questions for Class 11 Chemistry for all chapters on our website. Students should learn the objective based questions for Chapter 12 Organic Chemistry – Some Basic Principles and Techniques in Class 11 Chemistry provided below to get more marks in exams.

Chapter 12 Organic Chemistry – Some Basic Principles and Techniques MCQ Questions

Please refer to the following Chapter 12 Organic Chemistry – Some Basic Principles and Techniques MCQ Questions Class 11 Chemistry with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 12 Organic Chemistry – Some Basic Principles and Techniques Class 11 Chemistry

Question. Which of the following mentioned is a type of hydrocarbon?
(a) Saturated hydrocarbon 
(b) Unsaturated hydrocarbon
(c) Aromatic hydrocarbon
(d) All of the above     

Question. Name of following compound according to IUPAC nomenclature is

(a) 4-methox y-2-ni trobenzaldehyde
(b) 4-formyl-3-nitroanisole
(c) 4-methoxy-6-nitrobenzaldehyde
(d) 2-formyl-5-methylnitrobenzene

Question. IUPAC name of CH₂ = CH-CH(CH₂CH₃) C = CH₂ 
                                                                l                                               
                                                               Br
 is 
(a) 4-bromo-3-ethyl-1, 4-pentadiene
(b) 2-bromo-3-ethy 1-1 ,4-pentadiene
(c) 2-bromo-3-ethyl-1 ,5-pentadiene
(d) None of the above     

Question. IUPAC name of the following compound is 
                  CH₃   
                  I
CH₃—CH₂—CH—CH₂—CH CH₂—CH₂—CH₃
                                  l
                                 CH
                                 / \
                             CH₃ CH₃
(a) 4-isopropyl-6-methyloctane
(b) 3-methyl-5-(1-methyl ethyl)octane
(c) 3-meth y 1-5-isopropy !octane
(d) 6-methyl-4-(1-methylethyl) octane     

Question.

Question. Give the correct IUPAC name for
                      CH₃
                       I
       CH₃ ·CH₂OCH·CH₂ ·CH₂ ·CH₂CI
(a) 2-ethoxy-5-chloropentane
(b) l-chloro-4-ethoxy-4-methylbutane
(c) 1-chloro-4-ethoxypentane
(d) Ethyl-1-chloropentylether       

Question.

(a) bicyclo (2, 1, 0) pentane
(b) 1, 2-cyclopropyl-cyclobutane
(c) 1, 2-methylene cyclobutane
(d) cyclopentane-( 4, 3)-annulene

Question.

(a) but-3-enoic acid
(b) but-1-enoic acid
(c) pent-4-enoic acid
(d) prop-2-enoic acid

Question. The IUP AC name of the following compounds is 
        CH₂—CH—CH₂
         I        I      I 
        CH    CN    CN
(a) 1, 2, 3-tricyanopropane
(b) propane-1, 2, 3-trinitrile
(c) 3-cyanopentane-1, 5-dinitrile
(d) 1, 3, 5-pentanetrinitrile   

Question. TheIUPAC nan1e of the compound
       CH₂ = CH-CH(CH₃)₂ is 
(a) 1,1-dimethy-1-2-propene
(b) 2-vinyl propane
(c) 3-methy-1-butene
(d) 2-vinyl propene     

Question. What is the IUP AC name of isopropylamine? 
(a) Propan-2-amine
(b) Ethanamine
(c) 2-aminotoluene
(d) Propan-1-amine   

Question. The IUPAC name of the compound,
C₂H₅—C—CH₂OH is
          II
         CH₂
(a) 2-ethylprop-2-en-1-ol
(b) 2-hydrox ymethylbutan-1-o I
(c) 2-methylenebutan–o 1
(d) 2-ethyl-3-hydroxyprop–en       

Question. Propanal and propanone are
(a) functional isomers
(b) enantiomers
(c) chain isomers
(d) structural isomers     

Question. How many structural isomers are possible for C₄H₉Cl?
(a) 2
(b) 4
(c) 8
(d) 10     

Question. The number of optical isomers of CH₃CH(OH) CH(OH)CHO is 
(a) zero
(b) 2
(c) 3
(d) 4
(e) 6     

Question. How many optically active stereoisomers are possible for butane-2, 3-diol ? 
(a) o
(b) 1
(c) 2
(d) 3
(e) 4     

Question. Pick out the alkane which differs from the other members of the group. 
(a) 2,2-dimethyl propane
(b) Pentane
(c) 2-methyl butane
(d) 2,2-dimethyl butane     

Question. The isomers which are interconverted through rotation around a single bond are
(a) conformers
(b) diastereomers
(c) enantiomers
(d) position isomers     

Question. 2-pentanone and 3-methyl-2-butanone is a pair of isomers.
(a) functional
(b) chain
(c) positional
(d) stereo   

Question. Which of the following is a dynamic isomerism?
(a) Metamerism 
(b) Geometrical isomerism
(c) Tautomerism
(d) Coordinate isomerism     

Question. The reason for the loss of optical activity of lactic acid when —OH group is changed by H is that
(a) chiral centre of the molecule is destroyed
(b) molecules acquires asymmetry
(c) due to the change in configuration
(d) structural changes occur       

Question. Which type of isomerism is shown by 2, 3-dichlorobutane ?
(a) Structural
(c) Optical
(b) Geometric
(d) Diastereomer     

Question. The IUP AC name of neopentane is 
(a) 2-methylbutane
(b) 2,2-dimethylpropane
(c) 2-methylpropane
(d) 2,2-dimethylbutane     

Question. IUPAC name of (CH₃)₃ CCI is 
(a) n-butylchloride
(b) 3-chlorobutane
(c) 2-chloro- 2-methyl propane
(d) t-butyl chloride     

Question. Pick out the correct statement from the following and choose the correct answer from the codes given below.
I. Hexa-1, 5-diene is a conjugated diene.
II. Prop-I, 2-diene is conjugated diene.
III. Hexa-1, 3-diene is a conjugated diene.
IV. Buta-1, 3-diene is an isolated diene.
V. Prop-I, 2-diene is a cummulative diene. 
(a) I, II
(b) H, III
(c) IV, V
(d) II, V
(e) III, V     

Question. What will be the compound if two valencies of carbonyl group are satisfied by two alkyl groups?
(a) Aldehyde 
(b) Ketone
(c) Acid
(d) Acidic anhydride         

Question. CH₃—CH—CH₂—CH₃ the IUPAC name is
               l
              OC₂H₅
(a) 2-ethoxy pentane
(b) 4-ethoxy pentane
(c) pentylethyl ether
(d) 2-pentoxy ethane   

Question. The IUPAC name of CH₃COCH(CH₃)₂ is
(a) isopropylmethyl ketone
(b) 2-methyl-3-butanone
(c) 4-methylisopropyl ketone
(d) 3-methyl-2-butanone     

Question. Hyperconjugation involves overlap which of the following orbitals ?
(a) σ – σ
(b) σ – p
(c) p – p
(d) n – n    

Question. Mesometic effect involves delocalisation of
(a) pi-electrons
(b) sigma-electrons
(c) protons
(d) None of these   

Question. The number of sigma and pi-bonds in 1-butene-3-yne are
(a) 6 sigma and 4 pi
(b) 7 sigma and 3 pi
(c) 5 sigma and 5 pi
(d) None of these     

Question. Which one of the following acid does not have acarboxylic group? 
(a) Methanoic acid
(b) Ethanoic acid
(c) Propanoic acid
(d) Picric acid   

Question. Which one of the following is s-butyl phenyl vinyl methane?

Question. The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is 
(a) —, COOH,— SO₃H  — CONH₂ ,— CHO
(b) — SO₃H,— COOH,— CONH₂ ,— CHO
(c) — CHO,— COOH,— SO₃H, — CONH₂
(d) — CONH₂ ,— CHO,—SO₃H,— COOH       

Question. The IUPAC name of C₂H₅ — O — CH<_CH3^CH3 is
(a) ethoxy propane
(b) 1, 1-dimethyl ether
(c) 2-ethoxy-iso-propane
(d) 2-ethoxy propane   

Question. Correct structural formula of compound 5-nitro- 3-methoxy-3-methylhexanoyl chlo1ide is

Question.

(a) 2-methyl-3-bromohexanal
(b) 3-bromo-2-methylbutanal
(c) 2-bromo-3-bromobutanal
(d) 3-bromo-2-methylpentanal

Question. Which of the following is phenyl ethanoate?

Question. The IUPAC name of H₃C—CH—C₃H₇ is
                                           l
                                          OC₃H₇                             
(a) 4-propoxy pentane
(b) pentyl-propyl ether
(c) 2-propoxy pentane
(d) 2-pentoxy propane   

Question. The IUPAC name for tertiary butyl iodide is
(a) 4-iodo butane
(b) 2-iodo butane
(c) 1-iodo-3-methyl propane
(d) 2-iodo-2-methyl propane     

Question. The chemical name of anisole is 
(a) ethanoic acid
(b) methoxy benzene
(c) propanone
(d) acetone
(e) propanol   

Question. The IUPAC name of CH₃—CH= CH—C = CH is
(a) pent-3-en-1-yne 
(b) pent-3-en-4-yne
(c) pent-2-en-4-yne
(d) pent-2-en-3-yne   

Question. The correct name fo~w;ng hydmrarl>on fa
(a) tricyclo (4. 1.0) heptane 
(b) bicyclo (5.2.1) heptane
(c) bicyclo (4. 1.0) heptane
(d) bicyclo ( 4. 1.0) hexane         

Question. Which of the following represents neo-pentyl alcohol?
(a) CH₃CH(CH₃)CH₂CH₂OH
(b) (CH₃)₃ C—CH₂OH
(c) CH₃(CH₂)₃ OH
(d) CH₃CH₂CH(OH)C₂H₅           

Question. In cyclopropane, cyclobutane and cyclohexane, the common group is 
         l
(a) —C—
         l
      l
(b) CH₂
      l
(c) —CH₃
         l
(d) —CH     
         l     

Question. The IUP AC name for
        Cl
         l
CH₃—C—CH₂—CH=CH—CH₃ is
         l
        H
(a) 5-chloro-hex-2-ene
(b) 2-chloro-hex-5-ene
(c) 1-chloro- 1 -methylpent-3-ene
(d) 5-chloro-5-methylpent-2-ene     

Question. IUPAC name of CH₃—CH—CH₂—CHO is
                                      l
                                     Cl
(a) 3-chlorobutanol
(b) 3-chlorobutanaldehyde
(c) 3-chlorobutanal
(d) 2-chlorobutanol       

Question. t-butyl alcohol is
(a) 2-methylpropan-2ol
(b) 2-methylpropan-1 ol
(c) 3-methylbutan-1-ol
(d) 3-methylbutan-2-ol       

Question. The IUPAC name of the compound,
       CH₂—CH—COOH is
       l        l
      OH    NH₂
(a) 2-amino-3-hydroxypropanoic acid
(b) 1-hydroxy-2-aminopropan-3-oic acid
(c) 1-amino-2-hydroxypropanoic acid
(d) 3-hydroxy-2-aminopropanoic acid        

Question. Chloroacetic acid is a stronger acid than acetic acid. This can be explained using 
(a) – M-effect
(b) – I-effect
(c) + M effect
(d) + I-effect       

Question. Which of the following is a primary halide? 
(a) Isopropyl iodide
(b) Secondary butyl iodide
(c) Tertiary butyl bromide
(d) Neo hexyl chloride         

Question. IUP AC name of HC—C=CH—CH—CH₃ is Cl—CH₃
                                      l           l 
                                     CI         CH₃
(a) 2-chloro-4-methyl-2-pentene
(b) 4-chloro-2-methyl-3-pentene
(c) 4-methyl-2-chloro-2-pentene
(d) 2-chloro-4, 4-dimethyl-2-butene       

Question. Crown ethers are nan1ed as X-crown-Y. In the following crown ether, X and Y respectively, are

(a) 6 and 12
(b) 18 and 6
(c) 24 and 6
(d) 6 and 24
(e) 6 and 18

Question. The IUPAC name of the following compound is
HOOC—CH₂—CH—CH₂—CH₂—COOH
                     l
                    COOH 
(a) 2(carboxymethyl)-pentane-1, 5-dioic acid
(b) 3-carboxyhexane-1, 6-dioic acid
(c) butane-1, 2, 4-tricarboxylic acid
(d) 4-carboxyhexane-1, 6-dioic acid
(e) 1, 2-dicarboxy pentanoic acid       

Question. The IUPAC name of CH₃ — CH₂ — CHO is 
(a) propanal-1
(b) 2-methylbutanal
(c) butanal-1
(d) pentanal-1       

Question. The IUP AC name of the following compound is

(a) bicyclo [2, 2, O] octane
(b) bicyclo [O, 2, 2] hexane
(c) bicyclo [2, l, 1] hexane
(d) bicyclo [2, 2, O] hexane

Question. Chloroacetic acid is a stronger acid than acetic acid. This can be explained using 
(a) – M-effect
(b) – I-effect
(c) + M effect
(d) + I-effect       

Question. The IUPAC name of (CH₃ )₃C—CH= CH₂ is
(a) 1, 1, 1-trimethy 1-2-propene
(b) 3, 3, 3-trimethy 1-2-propene
(c) 2, 2-dimethyl-3-butene
(d) 3, 3-dimethyl-1-butene       

Question. The IUPAC name of

is
(a) l, l -diethyl-2, 2-dimethylpentane
(b) 4, 4-dimethyl-5, 5-diethylpentane
(c) 5, 5-diethyl-4, 4-dimethylpentane
(d) 3-ethyl-4, 4-dimethylheptane

Question. Glycerol is an alcohol which can be classified as
(a) trihydric
(b) monohydric 
(c) dihydric
(d) hexahydric     

Question. In the following carbocation, H/CH₃ that is most likely to migrate to the positively charged carbon is 
              H               H     
               l                l
   H₃ C¹—C²—₃ C⁺—⁴C—C⁵H₃
               l        l       l
             OH      H     CH₃
(a) CH₃ at C-4
(b) H at C-4
(c) CH₃ at C-2
(d) H at C-2     

Question. The most contributing tautomeric Me COCH₂CO₂ Et is  enol form of
(a) CH2 = (OH)CH₂CO₂ Et
(b) MeC(OH) = CHCO₂ Et
(c) MeCOCH = C(OH)O Et
(d) CH₂ = C(OH)CH = C(OH)O Et   

Question. Give the IUPAC name of the following compound.

(a) I, l, 3-trimethylcyclohex-2-ene
(b) l , 3, 3-trimethylcyclohex-1-ene
(c) I, I, 5-trimethylcyclohex-5-ene
(d) 2, 6, 6-trimethylcyclohex-1-ene

Question. Ibuprofen contains 
(a) only S-enantiomers
(b) only R-enantiomers
(c) racemic mixture of both Rand S enantiomers
(d) both Rand S-enantiomers are active pain colour     

Question. Which of the followng shows optical isomerism? 
(a) Butan-1-ol
(b) Butan-2-ol
(c) Butene
(d) But-2-enol       

Question. C₁₁H₂₄ can contain maximum methyl group upto
(a) 0
(b) 1
(c) 6
(d) 11     

                ⊕
Question. R₃N — CH =CH₂ →^HBr product. Predominant product is
         ⊕
(a) R₃N—CH—CH₃ 
               l
              Br
(b) R₃N—CH₂ — CH2 — Br
                       ⊕    Θ
(c) CH₂ =CH — NR₃ Br
(d) No reaction       

Question. C — H bond energy is about 101 kcal/moI for methane, ethane and other alkanes but is only 77 kcal/mol for C — H bond of CH₃ in toluene. This is because
(a) of inductive effect due to — CH₃ in toluene
(b) of the presence of benzene ring in toluene
(c) of the resonance among the structures of benzyl radical in toluene
(d) aromaticity of toluene       

Question. The correct IUP AC name of the following acid is

(a) Z-3-ethyl-4-methylhex-3-en-l-oic acid
(b) Z-3-ethyl-4-methylhexanoic acid
(c) Z-3,4-diethylpent-3-en-1-oic acid
(d) E-3-ethyl-4-methylhex-4-en-l-oic acid
(e) E-3-ethyl-4-methylhex-3-en-1-oic acid

Question. The correct name following hydmrarbon is

(a) tricyclo (4. 1.0) heptane
(b) bicyclo (5.2.1) heptane
(c) bicyclo (4. 1.0) heptane
(d) bicyclo ( 4. 1.0) hexane

Question. Among the following, the strongest nucleophilic is
(a) C₂H₅SH
(b) CH₃COO^– 
(c) CH₃NH₂
(d) NCCH^–₂     

Question. Bromination of arkanes involves 
(a) carbanions
(b) carbocations
(c) carbenes
(d) free radicals     

Question. The IUP AC name of the following compound, is

(a) 4-bromo-3-cyanophenol
(b) 2-bromo-5-hydroxybenzonitrile
(c) 2-cyano-4-hydroxybromobenzene
(d) 6-bromo-3-hydroxybenzonitrile

Question. Reaction of phenol with chloroform/sodium hydroxide to give o-hydroxy benzaldehyde involves the formation of
(a) dichloro carbene
(c) chlorine atoms
(b) trichloro carbene
(d) chlorine molecules     

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